1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qemu/osdep.h" 25 26 #include "net/net.h" 27 #include "clients.h" 28 #include "hub.h" 29 #include "net/slirp.h" 30 #include "net/eth.h" 31 #include "util.h" 32 33 #include "monitor/monitor.h" 34 #include "qemu-common.h" 35 #include "qapi/qmp/qerror.h" 36 #include "qemu/error-report.h" 37 #include "qemu/sockets.h" 38 #include "qemu/config-file.h" 39 #include "qmp-commands.h" 40 #include "hw/qdev.h" 41 #include "qemu/iov.h" 42 #include "qemu/main-loop.h" 43 #include "qapi-visit.h" 44 #include "qapi/opts-visitor.h" 45 #include "sysemu/sysemu.h" 46 #include "net/filter.h" 47 #include "qapi/string-output-visitor.h" 48 49 /* Net bridge is currently not supported for W32. */ 50 #if !defined(_WIN32) 51 # define CONFIG_NET_BRIDGE 52 #endif 53 54 static VMChangeStateEntry *net_change_state_entry; 55 static QTAILQ_HEAD(, NetClientState) net_clients; 56 57 const char *host_net_devices[] = { 58 "tap", 59 "socket", 60 "dump", 61 #ifdef CONFIG_NET_BRIDGE 62 "bridge", 63 #endif 64 #ifdef CONFIG_NETMAP 65 "netmap", 66 #endif 67 #ifdef CONFIG_SLIRP 68 "user", 69 #endif 70 #ifdef CONFIG_VDE 71 "vde", 72 #endif 73 "vhost-user", 74 NULL, 75 }; 76 77 int default_net = 1; 78 79 /***********************************************************/ 80 /* network device redirectors */ 81 82 #if defined(DEBUG_NET) 83 static void hex_dump(FILE *f, const uint8_t *buf, int size) 84 { 85 int len, i, j, c; 86 87 for(i=0;i<size;i+=16) { 88 len = size - i; 89 if (len > 16) 90 len = 16; 91 fprintf(f, "%08x ", i); 92 for(j=0;j<16;j++) { 93 if (j < len) 94 fprintf(f, " %02x", buf[i+j]); 95 else 96 fprintf(f, " "); 97 } 98 fprintf(f, " "); 99 for(j=0;j<len;j++) { 100 c = buf[i+j]; 101 if (c < ' ' || c > '~') 102 c = '.'; 103 fprintf(f, "%c", c); 104 } 105 fprintf(f, "\n"); 106 } 107 } 108 #endif 109 110 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 111 { 112 const char *p, *p1; 113 int len; 114 p = *pp; 115 p1 = strchr(p, sep); 116 if (!p1) 117 return -1; 118 len = p1 - p; 119 p1++; 120 if (buf_size > 0) { 121 if (len > buf_size - 1) 122 len = buf_size - 1; 123 memcpy(buf, p, len); 124 buf[len] = '\0'; 125 } 126 *pp = p1; 127 return 0; 128 } 129 130 int parse_host_port(struct sockaddr_in *saddr, const char *str) 131 { 132 char buf[512]; 133 struct hostent *he; 134 const char *p, *r; 135 int port; 136 137 p = str; 138 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) 139 return -1; 140 saddr->sin_family = AF_INET; 141 if (buf[0] == '\0') { 142 saddr->sin_addr.s_addr = 0; 143 } else { 144 if (qemu_isdigit(buf[0])) { 145 if (!inet_aton(buf, &saddr->sin_addr)) 146 return -1; 147 } else { 148 if ((he = gethostbyname(buf)) == NULL) 149 return - 1; 150 saddr->sin_addr = *(struct in_addr *)he->h_addr; 151 } 152 } 153 port = strtol(p, (char **)&r, 0); 154 if (r == p) 155 return -1; 156 saddr->sin_port = htons(port); 157 return 0; 158 } 159 160 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 161 { 162 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 163 macaddr[0], macaddr[1], macaddr[2], 164 macaddr[3], macaddr[4], macaddr[5]); 165 } 166 167 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 168 { 169 snprintf(nc->info_str, sizeof(nc->info_str), 170 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 171 nc->model, 172 macaddr[0], macaddr[1], macaddr[2], 173 macaddr[3], macaddr[4], macaddr[5]); 174 } 175 176 static int mac_table[256] = {0}; 177 178 static void qemu_macaddr_set_used(MACAddr *macaddr) 179 { 180 int index; 181 182 for (index = 0x56; index < 0xFF; index++) { 183 if (macaddr->a[5] == index) { 184 mac_table[index]++; 185 } 186 } 187 } 188 189 static void qemu_macaddr_set_free(MACAddr *macaddr) 190 { 191 int index; 192 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 193 194 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 195 return; 196 } 197 for (index = 0x56; index < 0xFF; index++) { 198 if (macaddr->a[5] == index) { 199 mac_table[index]--; 200 } 201 } 202 } 203 204 static int qemu_macaddr_get_free(void) 205 { 206 int index; 207 208 for (index = 0x56; index < 0xFF; index++) { 209 if (mac_table[index] == 0) { 210 return index; 211 } 212 } 213 214 return -1; 215 } 216 217 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 218 { 219 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 220 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 221 222 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 223 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 224 return; 225 } else { 226 qemu_macaddr_set_used(macaddr); 227 return; 228 } 229 } 230 231 macaddr->a[0] = 0x52; 232 macaddr->a[1] = 0x54; 233 macaddr->a[2] = 0x00; 234 macaddr->a[3] = 0x12; 235 macaddr->a[4] = 0x34; 236 macaddr->a[5] = qemu_macaddr_get_free(); 237 qemu_macaddr_set_used(macaddr); 238 } 239 240 /** 241 * Generate a name for net client 242 * 243 * Only net clients created with the legacy -net option and NICs need this. 244 */ 245 static char *assign_name(NetClientState *nc1, const char *model) 246 { 247 NetClientState *nc; 248 int id = 0; 249 250 QTAILQ_FOREACH(nc, &net_clients, next) { 251 if (nc == nc1) { 252 continue; 253 } 254 if (strcmp(nc->model, model) == 0) { 255 id++; 256 } 257 } 258 259 return g_strdup_printf("%s.%d", model, id); 260 } 261 262 static void qemu_net_client_destructor(NetClientState *nc) 263 { 264 g_free(nc); 265 } 266 267 static void qemu_net_client_setup(NetClientState *nc, 268 NetClientInfo *info, 269 NetClientState *peer, 270 const char *model, 271 const char *name, 272 NetClientDestructor *destructor) 273 { 274 nc->info = info; 275 nc->model = g_strdup(model); 276 if (name) { 277 nc->name = g_strdup(name); 278 } else { 279 nc->name = assign_name(nc, model); 280 } 281 282 if (peer) { 283 assert(!peer->peer); 284 nc->peer = peer; 285 peer->peer = nc; 286 } 287 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 288 289 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); 290 nc->destructor = destructor; 291 QTAILQ_INIT(&nc->filters); 292 } 293 294 NetClientState *qemu_new_net_client(NetClientInfo *info, 295 NetClientState *peer, 296 const char *model, 297 const char *name) 298 { 299 NetClientState *nc; 300 301 assert(info->size >= sizeof(NetClientState)); 302 303 nc = g_malloc0(info->size); 304 qemu_net_client_setup(nc, info, peer, model, name, 305 qemu_net_client_destructor); 306 307 return nc; 308 } 309 310 NICState *qemu_new_nic(NetClientInfo *info, 311 NICConf *conf, 312 const char *model, 313 const char *name, 314 void *opaque) 315 { 316 NetClientState **peers = conf->peers.ncs; 317 NICState *nic; 318 int i, queues = MAX(1, conf->peers.queues); 319 320 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); 321 assert(info->size >= sizeof(NICState)); 322 323 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 324 nic->ncs = (void *)nic + info->size; 325 nic->conf = conf; 326 nic->opaque = opaque; 327 328 for (i = 0; i < queues; i++) { 329 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 330 NULL); 331 nic->ncs[i].queue_index = i; 332 } 333 334 return nic; 335 } 336 337 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 338 { 339 return nic->ncs + queue_index; 340 } 341 342 NetClientState *qemu_get_queue(NICState *nic) 343 { 344 return qemu_get_subqueue(nic, 0); 345 } 346 347 NICState *qemu_get_nic(NetClientState *nc) 348 { 349 NetClientState *nc0 = nc - nc->queue_index; 350 351 return (NICState *)((void *)nc0 - nc->info->size); 352 } 353 354 void *qemu_get_nic_opaque(NetClientState *nc) 355 { 356 NICState *nic = qemu_get_nic(nc); 357 358 return nic->opaque; 359 } 360 361 static void qemu_cleanup_net_client(NetClientState *nc) 362 { 363 QTAILQ_REMOVE(&net_clients, nc, next); 364 365 if (nc->info->cleanup) { 366 nc->info->cleanup(nc); 367 } 368 } 369 370 static void qemu_free_net_client(NetClientState *nc) 371 { 372 if (nc->incoming_queue) { 373 qemu_del_net_queue(nc->incoming_queue); 374 } 375 if (nc->peer) { 376 nc->peer->peer = NULL; 377 } 378 g_free(nc->name); 379 g_free(nc->model); 380 if (nc->destructor) { 381 nc->destructor(nc); 382 } 383 } 384 385 void qemu_del_net_client(NetClientState *nc) 386 { 387 NetClientState *ncs[MAX_QUEUE_NUM]; 388 int queues, i; 389 NetFilterState *nf, *next; 390 391 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC); 392 393 /* If the NetClientState belongs to a multiqueue backend, we will change all 394 * other NetClientStates also. 395 */ 396 queues = qemu_find_net_clients_except(nc->name, ncs, 397 NET_CLIENT_OPTIONS_KIND_NIC, 398 MAX_QUEUE_NUM); 399 assert(queues != 0); 400 401 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { 402 object_unparent(OBJECT(nf)); 403 } 404 405 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 406 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 407 NICState *nic = qemu_get_nic(nc->peer); 408 if (nic->peer_deleted) { 409 return; 410 } 411 nic->peer_deleted = true; 412 413 for (i = 0; i < queues; i++) { 414 ncs[i]->peer->link_down = true; 415 } 416 417 if (nc->peer->info->link_status_changed) { 418 nc->peer->info->link_status_changed(nc->peer); 419 } 420 421 for (i = 0; i < queues; i++) { 422 qemu_cleanup_net_client(ncs[i]); 423 } 424 425 return; 426 } 427 428 for (i = 0; i < queues; i++) { 429 qemu_cleanup_net_client(ncs[i]); 430 qemu_free_net_client(ncs[i]); 431 } 432 } 433 434 void qemu_del_nic(NICState *nic) 435 { 436 int i, queues = MAX(nic->conf->peers.queues, 1); 437 438 qemu_macaddr_set_free(&nic->conf->macaddr); 439 440 /* If this is a peer NIC and peer has already been deleted, free it now. */ 441 if (nic->peer_deleted) { 442 for (i = 0; i < queues; i++) { 443 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 444 } 445 } 446 447 for (i = queues - 1; i >= 0; i--) { 448 NetClientState *nc = qemu_get_subqueue(nic, i); 449 450 qemu_cleanup_net_client(nc); 451 qemu_free_net_client(nc); 452 } 453 454 g_free(nic); 455 } 456 457 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 458 { 459 NetClientState *nc; 460 461 QTAILQ_FOREACH(nc, &net_clients, next) { 462 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 463 if (nc->queue_index == 0) { 464 func(qemu_get_nic(nc), opaque); 465 } 466 } 467 } 468 } 469 470 bool qemu_has_ufo(NetClientState *nc) 471 { 472 if (!nc || !nc->info->has_ufo) { 473 return false; 474 } 475 476 return nc->info->has_ufo(nc); 477 } 478 479 bool qemu_has_vnet_hdr(NetClientState *nc) 480 { 481 if (!nc || !nc->info->has_vnet_hdr) { 482 return false; 483 } 484 485 return nc->info->has_vnet_hdr(nc); 486 } 487 488 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 489 { 490 if (!nc || !nc->info->has_vnet_hdr_len) { 491 return false; 492 } 493 494 return nc->info->has_vnet_hdr_len(nc, len); 495 } 496 497 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 498 { 499 if (!nc || !nc->info->using_vnet_hdr) { 500 return; 501 } 502 503 nc->info->using_vnet_hdr(nc, enable); 504 } 505 506 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 507 int ecn, int ufo) 508 { 509 if (!nc || !nc->info->set_offload) { 510 return; 511 } 512 513 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 514 } 515 516 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 517 { 518 if (!nc || !nc->info->set_vnet_hdr_len) { 519 return; 520 } 521 522 nc->info->set_vnet_hdr_len(nc, len); 523 } 524 525 int qemu_set_vnet_le(NetClientState *nc, bool is_le) 526 { 527 #ifdef HOST_WORDS_BIGENDIAN 528 if (!nc || !nc->info->set_vnet_le) { 529 return -ENOSYS; 530 } 531 532 return nc->info->set_vnet_le(nc, is_le); 533 #else 534 return 0; 535 #endif 536 } 537 538 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 539 { 540 #ifdef HOST_WORDS_BIGENDIAN 541 return 0; 542 #else 543 if (!nc || !nc->info->set_vnet_be) { 544 return -ENOSYS; 545 } 546 547 return nc->info->set_vnet_be(nc, is_be); 548 #endif 549 } 550 551 int qemu_can_send_packet(NetClientState *sender) 552 { 553 int vm_running = runstate_is_running(); 554 555 if (!vm_running) { 556 return 0; 557 } 558 559 if (!sender->peer) { 560 return 1; 561 } 562 563 if (sender->peer->receive_disabled) { 564 return 0; 565 } else if (sender->peer->info->can_receive && 566 !sender->peer->info->can_receive(sender->peer)) { 567 return 0; 568 } 569 return 1; 570 } 571 572 static ssize_t filter_receive_iov(NetClientState *nc, 573 NetFilterDirection direction, 574 NetClientState *sender, 575 unsigned flags, 576 const struct iovec *iov, 577 int iovcnt, 578 NetPacketSent *sent_cb) 579 { 580 ssize_t ret = 0; 581 NetFilterState *nf = NULL; 582 583 if (direction == NET_FILTER_DIRECTION_TX) { 584 QTAILQ_FOREACH(nf, &nc->filters, next) { 585 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 586 iovcnt, sent_cb); 587 if (ret) { 588 return ret; 589 } 590 } 591 } else { 592 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) { 593 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 594 iovcnt, sent_cb); 595 if (ret) { 596 return ret; 597 } 598 } 599 } 600 601 return ret; 602 } 603 604 static ssize_t filter_receive(NetClientState *nc, 605 NetFilterDirection direction, 606 NetClientState *sender, 607 unsigned flags, 608 const uint8_t *data, 609 size_t size, 610 NetPacketSent *sent_cb) 611 { 612 struct iovec iov = { 613 .iov_base = (void *)data, 614 .iov_len = size 615 }; 616 617 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); 618 } 619 620 void qemu_purge_queued_packets(NetClientState *nc) 621 { 622 if (!nc->peer) { 623 return; 624 } 625 626 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 627 } 628 629 static 630 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 631 { 632 nc->receive_disabled = 0; 633 634 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 635 if (net_hub_flush(nc->peer)) { 636 qemu_notify_event(); 637 } 638 } 639 if (qemu_net_queue_flush(nc->incoming_queue)) { 640 /* We emptied the queue successfully, signal to the IO thread to repoll 641 * the file descriptor (for tap, for example). 642 */ 643 qemu_notify_event(); 644 } else if (purge) { 645 /* Unable to empty the queue, purge remaining packets */ 646 qemu_net_queue_purge(nc->incoming_queue, nc); 647 } 648 } 649 650 void qemu_flush_queued_packets(NetClientState *nc) 651 { 652 qemu_flush_or_purge_queued_packets(nc, false); 653 } 654 655 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 656 unsigned flags, 657 const uint8_t *buf, int size, 658 NetPacketSent *sent_cb) 659 { 660 NetQueue *queue; 661 int ret; 662 663 #ifdef DEBUG_NET 664 printf("qemu_send_packet_async:\n"); 665 hex_dump(stdout, buf, size); 666 #endif 667 668 if (sender->link_down || !sender->peer) { 669 return size; 670 } 671 672 /* Let filters handle the packet first */ 673 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, 674 sender, flags, buf, size, sent_cb); 675 if (ret) { 676 return ret; 677 } 678 679 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, 680 sender, flags, buf, size, sent_cb); 681 if (ret) { 682 return ret; 683 } 684 685 queue = sender->peer->incoming_queue; 686 687 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 688 } 689 690 ssize_t qemu_send_packet_async(NetClientState *sender, 691 const uint8_t *buf, int size, 692 NetPacketSent *sent_cb) 693 { 694 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 695 buf, size, sent_cb); 696 } 697 698 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 699 { 700 qemu_send_packet_async(nc, buf, size, NULL); 701 } 702 703 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 704 { 705 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 706 buf, size, NULL); 707 } 708 709 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 710 int iovcnt, unsigned flags) 711 { 712 uint8_t buf[NET_BUFSIZE]; 713 uint8_t *buffer; 714 size_t offset; 715 716 if (iovcnt == 1) { 717 buffer = iov[0].iov_base; 718 offset = iov[0].iov_len; 719 } else { 720 buffer = buf; 721 offset = iov_to_buf(iov, iovcnt, 0, buf, sizeof(buf)); 722 } 723 724 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 725 return nc->info->receive_raw(nc, buffer, offset); 726 } else { 727 return nc->info->receive(nc, buffer, offset); 728 } 729 } 730 731 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 732 unsigned flags, 733 const struct iovec *iov, 734 int iovcnt, 735 void *opaque) 736 { 737 NetClientState *nc = opaque; 738 int ret; 739 740 if (nc->link_down) { 741 return iov_size(iov, iovcnt); 742 } 743 744 if (nc->receive_disabled) { 745 return 0; 746 } 747 748 if (nc->info->receive_iov) { 749 ret = nc->info->receive_iov(nc, iov, iovcnt); 750 } else { 751 ret = nc_sendv_compat(nc, iov, iovcnt, flags); 752 } 753 754 if (ret == 0) { 755 nc->receive_disabled = 1; 756 } 757 758 return ret; 759 } 760 761 ssize_t qemu_sendv_packet_async(NetClientState *sender, 762 const struct iovec *iov, int iovcnt, 763 NetPacketSent *sent_cb) 764 { 765 NetQueue *queue; 766 int ret; 767 768 if (sender->link_down || !sender->peer) { 769 return iov_size(iov, iovcnt); 770 } 771 772 /* Let filters handle the packet first */ 773 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, 774 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 775 if (ret) { 776 return ret; 777 } 778 779 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, 780 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 781 if (ret) { 782 return ret; 783 } 784 785 queue = sender->peer->incoming_queue; 786 787 return qemu_net_queue_send_iov(queue, sender, 788 QEMU_NET_PACKET_FLAG_NONE, 789 iov, iovcnt, sent_cb); 790 } 791 792 ssize_t 793 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 794 { 795 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 796 } 797 798 NetClientState *qemu_find_netdev(const char *id) 799 { 800 NetClientState *nc; 801 802 QTAILQ_FOREACH(nc, &net_clients, next) { 803 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 804 continue; 805 if (!strcmp(nc->name, id)) { 806 return nc; 807 } 808 } 809 810 return NULL; 811 } 812 813 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 814 NetClientOptionsKind type, int max) 815 { 816 NetClientState *nc; 817 int ret = 0; 818 819 QTAILQ_FOREACH(nc, &net_clients, next) { 820 if (nc->info->type == type) { 821 continue; 822 } 823 if (!id || !strcmp(nc->name, id)) { 824 if (ret < max) { 825 ncs[ret] = nc; 826 } 827 ret++; 828 } 829 } 830 831 return ret; 832 } 833 834 static int nic_get_free_idx(void) 835 { 836 int index; 837 838 for (index = 0; index < MAX_NICS; index++) 839 if (!nd_table[index].used) 840 return index; 841 return -1; 842 } 843 844 int qemu_show_nic_models(const char *arg, const char *const *models) 845 { 846 int i; 847 848 if (!arg || !is_help_option(arg)) { 849 return 0; 850 } 851 852 fprintf(stderr, "qemu: Supported NIC models: "); 853 for (i = 0 ; models[i]; i++) 854 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 855 return 1; 856 } 857 858 void qemu_check_nic_model(NICInfo *nd, const char *model) 859 { 860 const char *models[2]; 861 862 models[0] = model; 863 models[1] = NULL; 864 865 if (qemu_show_nic_models(nd->model, models)) 866 exit(0); 867 if (qemu_find_nic_model(nd, models, model) < 0) 868 exit(1); 869 } 870 871 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 872 const char *default_model) 873 { 874 int i; 875 876 if (!nd->model) 877 nd->model = g_strdup(default_model); 878 879 for (i = 0 ; models[i]; i++) { 880 if (strcmp(nd->model, models[i]) == 0) 881 return i; 882 } 883 884 error_report("Unsupported NIC model: %s", nd->model); 885 return -1; 886 } 887 888 static int net_init_nic(const NetClientOptions *opts, const char *name, 889 NetClientState *peer, Error **errp) 890 { 891 int idx; 892 NICInfo *nd; 893 const NetLegacyNicOptions *nic; 894 895 assert(opts->type == NET_CLIENT_OPTIONS_KIND_NIC); 896 nic = opts->u.nic.data; 897 898 idx = nic_get_free_idx(); 899 if (idx == -1 || nb_nics >= MAX_NICS) { 900 error_setg(errp, "too many NICs"); 901 return -1; 902 } 903 904 nd = &nd_table[idx]; 905 906 memset(nd, 0, sizeof(*nd)); 907 908 if (nic->has_netdev) { 909 nd->netdev = qemu_find_netdev(nic->netdev); 910 if (!nd->netdev) { 911 error_setg(errp, "netdev '%s' not found", nic->netdev); 912 return -1; 913 } 914 } else { 915 assert(peer); 916 nd->netdev = peer; 917 } 918 nd->name = g_strdup(name); 919 if (nic->has_model) { 920 nd->model = g_strdup(nic->model); 921 } 922 if (nic->has_addr) { 923 nd->devaddr = g_strdup(nic->addr); 924 } 925 926 if (nic->has_macaddr && 927 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 928 error_setg(errp, "invalid syntax for ethernet address"); 929 return -1; 930 } 931 if (nic->has_macaddr && 932 is_multicast_ether_addr(nd->macaddr.a)) { 933 error_setg(errp, 934 "NIC cannot have multicast MAC address (odd 1st byte)"); 935 return -1; 936 } 937 qemu_macaddr_default_if_unset(&nd->macaddr); 938 939 if (nic->has_vectors) { 940 if (nic->vectors > 0x7ffffff) { 941 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 942 return -1; 943 } 944 nd->nvectors = nic->vectors; 945 } else { 946 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 947 } 948 949 nd->used = 1; 950 nb_nics++; 951 952 return idx; 953 } 954 955 956 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND__MAX])( 957 const NetClientOptions *opts, 958 const char *name, 959 NetClientState *peer, Error **errp) = { 960 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 961 #ifdef CONFIG_SLIRP 962 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 963 #endif 964 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 965 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 966 #ifdef CONFIG_VDE 967 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 968 #endif 969 #ifdef CONFIG_NETMAP 970 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap, 971 #endif 972 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 973 #ifdef CONFIG_NET_BRIDGE 974 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 975 #endif 976 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 977 #ifdef CONFIG_VHOST_NET_USED 978 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user, 979 #endif 980 #ifdef CONFIG_L2TPV3 981 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3, 982 #endif 983 }; 984 985 986 static int net_client_init1(const void *object, int is_netdev, Error **errp) 987 { 988 const NetClientOptions *opts; 989 const char *name; 990 NetClientState *peer = NULL; 991 992 if (is_netdev) { 993 const Netdev *netdev = object; 994 opts = netdev->opts; 995 name = netdev->id; 996 997 if (opts->type == NET_CLIENT_OPTIONS_KIND_DUMP || 998 opts->type == NET_CLIENT_OPTIONS_KIND_NIC || 999 !net_client_init_fun[opts->type]) { 1000 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1001 "a netdev backend type"); 1002 return -1; 1003 } 1004 } else { 1005 const NetLegacy *net = object; 1006 opts = net->opts; 1007 /* missing optional values have been initialized to "all bits zero" */ 1008 name = net->has_id ? net->id : net->name; 1009 1010 if (opts->type == NET_CLIENT_OPTIONS_KIND_NONE) { 1011 return 0; /* nothing to do */ 1012 } 1013 if (opts->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 1014 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1015 "a net type"); 1016 return -1; 1017 } 1018 1019 if (!net_client_init_fun[opts->type]) { 1020 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1021 "a net backend type (maybe it is not compiled " 1022 "into this binary)"); 1023 return -1; 1024 } 1025 1026 /* Do not add to a vlan if it's a nic with a netdev= parameter. */ 1027 if (opts->type != NET_CLIENT_OPTIONS_KIND_NIC || 1028 !opts->u.nic.data->has_netdev) { 1029 peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL); 1030 } 1031 } 1032 1033 if (net_client_init_fun[opts->type](opts, name, peer, errp) < 0) { 1034 /* FIXME drop when all init functions store an Error */ 1035 if (errp && !*errp) { 1036 error_setg(errp, QERR_DEVICE_INIT_FAILED, 1037 NetClientOptionsKind_lookup[opts->type]); 1038 } 1039 return -1; 1040 } 1041 return 0; 1042 } 1043 1044 1045 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 1046 { 1047 void *object = NULL; 1048 Error *err = NULL; 1049 int ret = -1; 1050 OptsVisitor *ov = opts_visitor_new(opts); 1051 Visitor *v = opts_get_visitor(ov); 1052 1053 { 1054 /* Parse convenience option format ip6-net=fec0::0[/64] */ 1055 const char *ip6_net = qemu_opt_get(opts, "ip6-net"); 1056 1057 if (ip6_net) { 1058 char buf[strlen(ip6_net) + 1]; 1059 1060 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) { 1061 /* Default 64bit prefix length. */ 1062 qemu_opt_set(opts, "ip6-prefix", ip6_net, &error_abort); 1063 qemu_opt_set_number(opts, "ip6-prefixlen", 64, &error_abort); 1064 } else { 1065 /* User-specified prefix length. */ 1066 unsigned long len; 1067 int err; 1068 1069 qemu_opt_set(opts, "ip6-prefix", buf, &error_abort); 1070 err = qemu_strtoul(ip6_net, NULL, 10, &len); 1071 1072 if (err) { 1073 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1074 "ip6-prefix", "a number"); 1075 } else { 1076 qemu_opt_set_number(opts, "ip6-prefixlen", len, 1077 &error_abort); 1078 } 1079 } 1080 qemu_opt_unset(opts, "ip6-net"); 1081 } 1082 } 1083 1084 if (is_netdev) { 1085 visit_type_Netdev(v, NULL, (Netdev **)&object, &err); 1086 } else { 1087 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); 1088 } 1089 1090 if (!err) { 1091 ret = net_client_init1(object, is_netdev, &err); 1092 } 1093 1094 if (is_netdev) { 1095 qapi_free_Netdev(object); 1096 } else { 1097 qapi_free_NetLegacy(object); 1098 } 1099 1100 error_propagate(errp, err); 1101 return ret; 1102 } 1103 1104 1105 static int net_host_check_device(const char *device) 1106 { 1107 int i; 1108 for (i = 0; host_net_devices[i]; i++) { 1109 if (!strncmp(host_net_devices[i], device, 1110 strlen(host_net_devices[i]))) { 1111 return 1; 1112 } 1113 } 1114 1115 return 0; 1116 } 1117 1118 void hmp_host_net_add(Monitor *mon, const QDict *qdict) 1119 { 1120 const char *device = qdict_get_str(qdict, "device"); 1121 const char *opts_str = qdict_get_try_str(qdict, "opts"); 1122 Error *local_err = NULL; 1123 QemuOpts *opts; 1124 1125 if (!net_host_check_device(device)) { 1126 monitor_printf(mon, "invalid host network device %s\n", device); 1127 return; 1128 } 1129 1130 opts = qemu_opts_parse_noisily(qemu_find_opts("net"), 1131 opts_str ? opts_str : "", false); 1132 if (!opts) { 1133 return; 1134 } 1135 1136 qemu_opt_set(opts, "type", device, &error_abort); 1137 1138 net_client_init(opts, 0, &local_err); 1139 if (local_err) { 1140 error_report_err(local_err); 1141 monitor_printf(mon, "adding host network device %s failed\n", device); 1142 } 1143 } 1144 1145 void hmp_host_net_remove(Monitor *mon, const QDict *qdict) 1146 { 1147 NetClientState *nc; 1148 int vlan_id = qdict_get_int(qdict, "vlan_id"); 1149 const char *device = qdict_get_str(qdict, "device"); 1150 1151 nc = net_hub_find_client_by_name(vlan_id, device); 1152 if (!nc) { 1153 error_report("Host network device '%s' on hub '%d' not found", 1154 device, vlan_id); 1155 return; 1156 } 1157 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1158 error_report("invalid host network device '%s'", device); 1159 return; 1160 } 1161 1162 qemu_del_net_client(nc->peer); 1163 qemu_del_net_client(nc); 1164 } 1165 1166 void netdev_add(QemuOpts *opts, Error **errp) 1167 { 1168 net_client_init(opts, 1, errp); 1169 } 1170 1171 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp) 1172 { 1173 Error *local_err = NULL; 1174 QemuOptsList *opts_list; 1175 QemuOpts *opts; 1176 1177 opts_list = qemu_find_opts_err("netdev", &local_err); 1178 if (local_err) { 1179 goto out; 1180 } 1181 1182 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1183 if (local_err) { 1184 goto out; 1185 } 1186 1187 netdev_add(opts, &local_err); 1188 if (local_err) { 1189 qemu_opts_del(opts); 1190 goto out; 1191 } 1192 1193 out: 1194 error_propagate(errp, local_err); 1195 } 1196 1197 void qmp_netdev_del(const char *id, Error **errp) 1198 { 1199 NetClientState *nc; 1200 QemuOpts *opts; 1201 1202 nc = qemu_find_netdev(id); 1203 if (!nc) { 1204 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1205 "Device '%s' not found", id); 1206 return; 1207 } 1208 1209 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1210 if (!opts) { 1211 error_setg(errp, "Device '%s' is not a netdev", id); 1212 return; 1213 } 1214 1215 qemu_del_net_client(nc); 1216 qemu_opts_del(opts); 1217 } 1218 1219 static void netfilter_print_info(Monitor *mon, NetFilterState *nf) 1220 { 1221 char *str; 1222 ObjectProperty *prop; 1223 ObjectPropertyIterator iter; 1224 StringOutputVisitor *ov; 1225 1226 /* generate info str */ 1227 object_property_iter_init(&iter, OBJECT(nf)); 1228 while ((prop = object_property_iter_next(&iter))) { 1229 if (!strcmp(prop->name, "type")) { 1230 continue; 1231 } 1232 ov = string_output_visitor_new(false); 1233 object_property_get(OBJECT(nf), string_output_get_visitor(ov), 1234 prop->name, NULL); 1235 str = string_output_get_string(ov); 1236 string_output_visitor_cleanup(ov); 1237 monitor_printf(mon, ",%s=%s", prop->name, str); 1238 g_free(str); 1239 } 1240 monitor_printf(mon, "\n"); 1241 } 1242 1243 void print_net_client(Monitor *mon, NetClientState *nc) 1244 { 1245 NetFilterState *nf; 1246 1247 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1248 nc->queue_index, 1249 NetClientOptionsKind_lookup[nc->info->type], 1250 nc->info_str); 1251 if (!QTAILQ_EMPTY(&nc->filters)) { 1252 monitor_printf(mon, "filters:\n"); 1253 } 1254 QTAILQ_FOREACH(nf, &nc->filters, next) { 1255 char *path = object_get_canonical_path_component(OBJECT(nf)); 1256 1257 monitor_printf(mon, " - %s: type=%s", path, 1258 object_get_typename(OBJECT(nf))); 1259 netfilter_print_info(mon, nf); 1260 g_free(path); 1261 } 1262 } 1263 1264 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1265 Error **errp) 1266 { 1267 NetClientState *nc; 1268 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1269 1270 QTAILQ_FOREACH(nc, &net_clients, next) { 1271 RxFilterInfoList *entry; 1272 RxFilterInfo *info; 1273 1274 if (has_name && strcmp(nc->name, name) != 0) { 1275 continue; 1276 } 1277 1278 /* only query rx-filter information of NIC */ 1279 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) { 1280 if (has_name) { 1281 error_setg(errp, "net client(%s) isn't a NIC", name); 1282 return NULL; 1283 } 1284 continue; 1285 } 1286 1287 /* only query information on queue 0 since the info is per nic, 1288 * not per queue 1289 */ 1290 if (nc->queue_index != 0) 1291 continue; 1292 1293 if (nc->info->query_rx_filter) { 1294 info = nc->info->query_rx_filter(nc); 1295 entry = g_malloc0(sizeof(*entry)); 1296 entry->value = info; 1297 1298 if (!filter_list) { 1299 filter_list = entry; 1300 } else { 1301 last_entry->next = entry; 1302 } 1303 last_entry = entry; 1304 } else if (has_name) { 1305 error_setg(errp, "net client(%s) doesn't support" 1306 " rx-filter querying", name); 1307 return NULL; 1308 } 1309 1310 if (has_name) { 1311 break; 1312 } 1313 } 1314 1315 if (filter_list == NULL && has_name) { 1316 error_setg(errp, "invalid net client name: %s", name); 1317 } 1318 1319 return filter_list; 1320 } 1321 1322 void hmp_info_network(Monitor *mon, const QDict *qdict) 1323 { 1324 NetClientState *nc, *peer; 1325 NetClientOptionsKind type; 1326 1327 net_hub_info(mon); 1328 1329 QTAILQ_FOREACH(nc, &net_clients, next) { 1330 peer = nc->peer; 1331 type = nc->info->type; 1332 1333 /* Skip if already printed in hub info */ 1334 if (net_hub_id_for_client(nc, NULL) == 0) { 1335 continue; 1336 } 1337 1338 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 1339 print_net_client(mon, nc); 1340 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1341 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 1342 monitor_printf(mon, " \\ "); 1343 print_net_client(mon, peer); 1344 } 1345 } 1346 } 1347 1348 void qmp_set_link(const char *name, bool up, Error **errp) 1349 { 1350 NetClientState *ncs[MAX_QUEUE_NUM]; 1351 NetClientState *nc; 1352 int queues, i; 1353 1354 queues = qemu_find_net_clients_except(name, ncs, 1355 NET_CLIENT_OPTIONS_KIND__MAX, 1356 MAX_QUEUE_NUM); 1357 1358 if (queues == 0) { 1359 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1360 "Device '%s' not found", name); 1361 return; 1362 } 1363 nc = ncs[0]; 1364 1365 for (i = 0; i < queues; i++) { 1366 ncs[i]->link_down = !up; 1367 } 1368 1369 if (nc->info->link_status_changed) { 1370 nc->info->link_status_changed(nc); 1371 } 1372 1373 if (nc->peer) { 1374 /* Change peer link only if the peer is NIC and then notify peer. 1375 * If the peer is a HUBPORT or a backend, we do not change the 1376 * link status. 1377 * 1378 * This behavior is compatible with qemu vlans where there could be 1379 * multiple clients that can still communicate with each other in 1380 * disconnected mode. For now maintain this compatibility. 1381 */ 1382 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1383 for (i = 0; i < queues; i++) { 1384 ncs[i]->peer->link_down = !up; 1385 } 1386 } 1387 if (nc->peer->info->link_status_changed) { 1388 nc->peer->info->link_status_changed(nc->peer); 1389 } 1390 } 1391 } 1392 1393 static void net_vm_change_state_handler(void *opaque, int running, 1394 RunState state) 1395 { 1396 NetClientState *nc; 1397 NetClientState *tmp; 1398 1399 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1400 if (running) { 1401 /* Flush queued packets and wake up backends. */ 1402 if (nc->peer && qemu_can_send_packet(nc)) { 1403 qemu_flush_queued_packets(nc->peer); 1404 } 1405 } else { 1406 /* Complete all queued packets, to guarantee we don't modify 1407 * state later when VM is not running. 1408 */ 1409 qemu_flush_or_purge_queued_packets(nc, true); 1410 } 1411 } 1412 } 1413 1414 void net_cleanup(void) 1415 { 1416 NetClientState *nc; 1417 1418 /* We may del multiple entries during qemu_del_net_client(), 1419 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1420 */ 1421 while (!QTAILQ_EMPTY(&net_clients)) { 1422 nc = QTAILQ_FIRST(&net_clients); 1423 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1424 qemu_del_nic(qemu_get_nic(nc)); 1425 } else { 1426 qemu_del_net_client(nc); 1427 } 1428 } 1429 1430 qemu_del_vm_change_state_handler(net_change_state_entry); 1431 } 1432 1433 void net_check_clients(void) 1434 { 1435 NetClientState *nc; 1436 int i; 1437 1438 /* Don't warn about the default network setup that you get if 1439 * no command line -net or -netdev options are specified. There 1440 * are two cases that we would otherwise complain about: 1441 * (1) board doesn't support a NIC but the implicit "-net nic" 1442 * requested one 1443 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1444 * sets up a nic that isn't connected to anything. 1445 */ 1446 if (default_net) { 1447 return; 1448 } 1449 1450 net_hub_check_clients(); 1451 1452 QTAILQ_FOREACH(nc, &net_clients, next) { 1453 if (!nc->peer) { 1454 fprintf(stderr, "Warning: %s %s has no peer\n", 1455 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1456 "nic" : "netdev", nc->name); 1457 } 1458 } 1459 1460 /* Check that all NICs requested via -net nic actually got created. 1461 * NICs created via -device don't need to be checked here because 1462 * they are always instantiated. 1463 */ 1464 for (i = 0; i < MAX_NICS; i++) { 1465 NICInfo *nd = &nd_table[i]; 1466 if (nd->used && !nd->instantiated) { 1467 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1468 "was not created (not supported by this machine?)\n", 1469 nd->name ? nd->name : "anonymous", 1470 nd->model ? nd->model : "unspecified"); 1471 } 1472 } 1473 } 1474 1475 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1476 { 1477 Error *local_err = NULL; 1478 1479 net_client_init(opts, 0, &local_err); 1480 if (local_err) { 1481 error_report_err(local_err); 1482 return -1; 1483 } 1484 1485 return 0; 1486 } 1487 1488 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1489 { 1490 Error *local_err = NULL; 1491 int ret; 1492 1493 ret = net_client_init(opts, 1, &local_err); 1494 if (local_err) { 1495 error_report_err(local_err); 1496 return -1; 1497 } 1498 1499 return ret; 1500 } 1501 1502 int net_init_clients(void) 1503 { 1504 QemuOptsList *net = qemu_find_opts("net"); 1505 1506 if (default_net) { 1507 /* if no clients, we use a default config */ 1508 qemu_opts_set(net, NULL, "type", "nic", &error_abort); 1509 #ifdef CONFIG_SLIRP 1510 qemu_opts_set(net, NULL, "type", "user", &error_abort); 1511 #endif 1512 } 1513 1514 net_change_state_entry = 1515 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1516 1517 QTAILQ_INIT(&net_clients); 1518 1519 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1520 net_init_netdev, NULL, NULL)) { 1521 return -1; 1522 } 1523 1524 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) { 1525 return -1; 1526 } 1527 1528 return 0; 1529 } 1530 1531 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1532 { 1533 #if defined(CONFIG_SLIRP) 1534 int ret; 1535 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1536 return ret; 1537 } 1538 #endif 1539 1540 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) { 1541 return -1; 1542 } 1543 1544 default_net = 0; 1545 return 0; 1546 } 1547 1548 /* From FreeBSD */ 1549 /* XXX: optimize */ 1550 unsigned compute_mcast_idx(const uint8_t *ep) 1551 { 1552 uint32_t crc; 1553 int carry, i, j; 1554 uint8_t b; 1555 1556 crc = 0xffffffff; 1557 for (i = 0; i < 6; i++) { 1558 b = *ep++; 1559 for (j = 0; j < 8; j++) { 1560 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1561 crc <<= 1; 1562 b >>= 1; 1563 if (carry) { 1564 crc = ((crc ^ POLYNOMIAL) | carry); 1565 } 1566 } 1567 } 1568 return crc >> 26; 1569 } 1570 1571 QemuOptsList qemu_netdev_opts = { 1572 .name = "netdev", 1573 .implied_opt_name = "type", 1574 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1575 .desc = { 1576 /* 1577 * no elements => accept any params 1578 * validation will happen later 1579 */ 1580 { /* end of list */ } 1581 }, 1582 }; 1583 1584 QemuOptsList qemu_net_opts = { 1585 .name = "net", 1586 .implied_opt_name = "type", 1587 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1588 .desc = { 1589 /* 1590 * no elements => accept any params 1591 * validation will happen later 1592 */ 1593 { /* end of list */ } 1594 }, 1595 }; 1596